ansys.mapdl.core.Mapdl.cbmd

Mapdl.cbmd(row='', c_r__r='', c_r__rplus1='', c_r__rplus2='', c_r__rplus3='', c_r__rplus4='', c_r__rplus5='', **kwargs)

Specifies preintegrated section mass matrix for composite-beam sections.

Mechanical APDL Command: CBMD

Parameters:

rowstr

Row number of the matrix.

c_r__rstr

Upper triangle of the cross-section mass matrix [C].

c_r__rplus1str

Upper triangle of the cross-section mass matrix [C].

c_r__rplus2str

Upper triangle of the cross-section mass matrix [C].

c_r__rplus3str

Upper triangle of the cross-section mass matrix [C].

c_r__rplus4str

Upper triangle of the cross-section mass matrix [C].

c_r__rplus5str

Upper triangle of the cross-section mass matrix [C].

Notes

With a unit beam length, the section mass matrix relates the resultant forces and torques to accelerations and angular accelerations as follows (applicable to the local element coordinate system):

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The cbmd command, one of several composite beam section commands, specifies the section mass matrix (submatrix [ C ] data) for a composite beam section. The section data defined is associated with the section most recently defined ( sectype ) at the specified temperature ( cbtmp ).

Unspecified values default to zero.

Related commands are cbtmp, cbte, and cbmx.

For complete information, see Using Preintegrated Composite Beam Sections